The phrase "in high gear" is believed to have originated in the early 20th century, and it is a reference to the highest gear in a manual transmission vehicle, which allows for the fastest and most efficient speed. This idiom is used to describe a situation where someone is operating at their highest level of productivity or efficiency.

What is the origin of the idiom "in high gear" and when to use it?

Définition et signification de « in high gear » en anglais

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